Last year, Sir Tim Berners-Lee, the inventor of the World Wide Web, issued a dire warning about a growing crisis of gender inequality online, decrying the relentless and often sexualized harassment of female public figures and a rise in online violence, from threatening messages to non-consensual publication of private images.

Berners-Lee’s concern is well founded: online harassment of women is pernicious and alarmingly widespread. One global survey found that more than half of women and girls between the ages of 15 and 25 had experienced online abuse.